President Donald Trump issued a rare threat of nuclear escalation on Friday, saying he had ordered two nuclear submarines to be strategically positioned near Russia in response to what he said were aggressive remarks by Dmitry Medvedev, the country’s former president and current deputy chairman of its Security Council.

Donald Trump escalated tensions with Russia by ordering two U.S. nuclear submarines to reposition themselves near Russian waters.

Dmitry Medvedev said President Trump is "playing the ultimatum game with Russia" in pressuring for an end to the war on Ukraine.